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September Weather in Leesburg, United States

Last updated: June 24, 2025

In September, the average temperature in Leesburg, United States is a pleasantly warm 26°C (80°F). Daily temperatures can range from a comfortable 13°C (56°F) to a sweltering 38°C (101°F). Visitors should also prepare for 109 mm (4.3 in) of precipitation spread over about 10 days, with an average humidity of 83%.

September Temperature in Leesburg

In September in Leesburg, the average temperature is 26°C (80°F). Maximums can reach 38°C (101°F), and minimums can be as low as 13°C (56°F). Visitors should be prepared for warm weather, with the possibility of cooler evenings, making it an ideal time for both outdoor adventures and leisurely explorations.

September Weather in Leesburg: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Leesburg, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Leesburg, September typically has an average temperature of 26°C (80°F), with highs reaching up to 38°C (101°F) and lows dropping to around 13°C (56°F).
JanFebMarAprMayJunJulAugSepOctNovDec515762677580828279725853
Data source: Temperature data for Leesburg generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Leesburg

In Leesburg in September, the precipitation amount is 109 mm (4.3 in) spread over 10 days.

September Precipitation Trends in Leesburg

The chart displays monthly precipitation patterns in Leesburg, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Leesburg, September typically receives around 109 mm (4.3 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec7911486106821001081031099256121
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Leesburg

In Leesburg in September humidity is 83%. With an average temperature of 26°C (80°F), this humidity feels like a warm, enveloping blanket that can make traveling quite uncomfortable; you may find yourself needing frequent breaks for hydration and cool shade as the thick air clings to your skin.

September Average Humidity in Leesburg

This chart illustrates the average monthly humidity levels in Leesburg, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Leesburg is approximately 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%82%80%76%73%74%80%79%83%77%84%88%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Leesburg

In Leesburg in September, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Leesburg.

Maximum UV Index Levels in Leesburg for September

The chart shows the monthly maximum UV Index (UVI) for Leesburg in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in Leesburg typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec589101111111110864
Data source: Leesburg September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How September Weather in Leesburg Compares to Other Months

Weather in Leesburg varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Leesburg, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Leesburg, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather11°C (51°F)79 mm (3.1 inches)85%moderate
February Weather14°C (57°F)114 mm (4.5 inches)82%very high
March Weather16°C (62°F)86 mm (3.4 inches)80%very high
April Weather19°C (67°F)106 mm (4.2 inches)76%very high
May Weather24°C (75°F)82 mm (3.2 inches)73%extreme
June Weather27°C (80°F)100 mm (3.9 inches)74%extreme
July Weather28°C (82°F)107 mm (4.2 inches)80%extreme
August Weather28°C (82°F)103 mm (4.0 inches)79%extreme
September Weather26°C (80°F)109 mm (4.3 inches)83%very high
October Weather22°C (72°F)92 mm (3.6 inches)77%very high
November Weather14°C (58°F)56 mm (2.2 inches)84%high
December Weather12°C (54°F)121 mm (4.8 inches)88%moderate

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